Refer to the equations shown. A starting population has 150 animals.During the year, 50 animals are born and 30 die.Ten animals immigrate into the population, and 5 emigrate.At the end of the year, what is the per capita growth rate for this population?
A) r = 0.13
B) r = 0.33
C) ∆N = 20
D) ∆N = 25
E) ∆N = 50

Question

Refer to the equations shown.  A starting population has 150 animals.During the year, 50 animals are born and 30 die.Ten animals immigrate into the population, and 5 emigrate.At the end of the year, what is the per capita growth rate for this population?
A) r = 0.13 
B) r = 0.33 
C) ∆N = 20 
D) ∆N = 25 
E) ∆N = 50

Quizplus · Accepted Answer

The per capita growth rate (r) can be calculated using the following formula:

r = (births - deaths + immigration - emigration) / starting population

Plugging in the given values:

r = (50 - 30 + 10 - 5) / 150 
r = 0.13

Therefore, the per capita growth rate for this population is 0.13, which is option A.

Refer to the Equations Shown